Barkmullz writes: The National Security Agency (NSA) is conducting a counterintelligence probe at its Fort Meade, Md., headquarters in a top-secret hunt for a Russian agent, according to a former intelligence official close to the agency. The former official said the probe grew out of the case of 10 Russian "illegals," or deep-cover spies, who were uncovered last summer and sent back to Moscow after the defection of Col. Alexander Poteyev, a former SVR foreign intelligence officer who reportedly fled to the U.S. shortly before Russian President Dmitry Medvedev visited here in June.